<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8"/>
    <title>Insert title here</title>
</head>
<body>
错误信息：<h4 th:text="${msg}"></h4>
<form action="" method="post">
    <p>账号：<input name="username" type="text" value="admin"/></p>
    <p>密码：<input name="password" type="text" value="123456"/></p>
    <p><input type="submit" value="登录"/></p>
</form>
</body>
</html>